ASP.NET 5 compatible package

ASP.NET 5 compatible package: NLog.Web.ASPNET5

build from NLog.Web 4.2

The following parts are supported in ASP.NET 5:

• aspnet-item
• aspnet-request
• aspnet-session
• aspnet-user-authtype
• aspnet-user-identity
• iis-site-name

V4.2.0

• render headers. E.G ${aspnet-request:header=header1}
• added AspNetLayoutRendererBase for easier creating Layout renderers and unit testing.

V4.1.0

• added ${aspnet-item} (reads httpcontext)
• Fixed culture (InvariantCulture replaced with UICulture). Fixed for:
  • ${aspnet-application}
  • ${aspnet-request}
  • ${aspnet-session}
  • ${aspnet-item}

v4.0.0

Update appveyor.yml

v2.0.0 - Nlog 4.0 compatible

Update to NLog 4.0